EP3485821B1 - Orthopädisches reibahlensystem - Google Patents

Orthopädisches reibahlensystem Download PDF

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Publication number
EP3485821B1
EP3485821B1 EP18199172.0A EP18199172A EP3485821B1 EP 3485821 B1 EP3485821 B1 EP 3485821B1 EP 18199172 A EP18199172 A EP 18199172A EP 3485821 B1 EP3485821 B1 EP 3485821B1
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EP
European Patent Office
Prior art keywords
axis
collar
rotation
reamer
orthopaedic
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Active
Application number
EP18199172.0A
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English (en)
French (fr)
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EP3485821A1 (de
Inventor
Todd A. Wolford
Mark A. Nordman
Arif H. Bin Jalalluddin
David J. Whitehead
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Symmetry Medical Manufacturing Inc
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Symmetry Medical Manufacturing Inc
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Publication of EP3485821A1 publication Critical patent/EP3485821A1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1622—Drill handpieces
    • A61B17/1624—Drive mechanisms therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1631—Special drive shafts, e.g. flexible shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1633—Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1664—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip
    • A61B17/1666—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the acetabulum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/162—Chucks or tool parts which are to be held in a chuck
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1742—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip
    • A61B17/1746—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip for the acetabulum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00477—Coupling

Definitions

  • the present invention relates to orthopaedic instruments, and, more particularly, to orthopaedic reamers and associated drivers.
  • reamer In the field of orthopaedic surgery, it is often necessary to remove bone material and other tissue to enable implantation of a prosthesis to repair a joint in the human body.
  • One particular instrument used to remove tissue from a joint is known in the art as a "reamer,” which generally includes a semi-spherical shell with an arrangement of cutting openings on the surface of the shell and is connected to a driver which connects the reamer to a source of rotary motion to rotate the reamer and remove tissue.
  • a variety of constructions are known for connecting the reamer to the driver.
  • One style of driver that is commonly used is known as the "Othy style” manufactured by Tecomet, Inc. which includes a crossbridge (also known as a bridgeback) element having a bar extending between the circumference of the hemisphere and having a circular expanded section in the middle.
  • Another style of driver that is commonly used is known as a "cruciform reamer” manufactured by Greatbatch Medical and which has a crossbar shape in which two circular cross section bars intersect at the center and extend to the walls of the hemisphere.
  • hybrid reamers While both the Othy style and cruciform reamer connectors are suitable for connecting a reamer to a source of rotary motion, recent developments in orthopaedic surgery have produced what are known as "hybrid" reamers. Examples of hybrid reamers are described in U.S. Patent Nos. 7,850,693 , 7,278,996 , and 6,875,217 to Wolford , which replace the traditional crossbridge and cruciform constructions on the back of the reamer with attachment features that connect to a reamer connector.
  • the attachment feature construction of the hybrid reamer taught by Wolford provides a secure connection between a reamer and a driver while reducing the incision size needed for the procedure, compared to a crossbridge or cruciform reamer, allowing the hybrid reamer to be suitable for both minimally invasive and open total hip arthroplasty. Further, eliminating the connection bars on the back of the reamer allows for increased visibility into the surgical site. While the hybrid reamer taught by Wolford is effective, a need remains for further improvements on the hybrid reamer design. Further, document WO 2012/136972 A1 discloses a surgical drive tool including a drive shaft having a first end arranged to couple to a rotational driver. A drive head is coupled to a second end of the drive shaft.
  • a first portion of the drive head does not extend outside of a predetermined shape surrounding the drive shaft axis and incorporates a drive head slot.
  • a drive dog is coupled to the drive shaft and is arranged to slide relative to the drive shaft to engage the drive head slot. The combination of the first portion and the drive dog extends outside of the predetermined shape.
  • the drive dog is arranged to retract from the drive head slot to allow the first portion to be inserted through an orifice defined by the predetermined shape in a surgical instrument.
  • the drive head is arranged to rotate within the orifice such that the first portion cannot be retracted from the orifice and such that the drive dog can engage the drive head slot through the orifice to limit further rotational movement between the drive tool and the orifice.
  • the present invention provides a reamer system including a collar associated with a reamer connector which can slide between a first position in which an orthopaedic shell can be rotated out of a holding recess of the reamer connector and a second position in which an orthopaedic shell can be rotatably locked within the holding recess.
  • the invention in one form is directed to a driver for an orthopaedic reamer including: a drive shaft defining an axis of rotation; a reamer connector connected to the drive shaft and having at least one first annular portion about the axis of rotation and at least one second annular portion about the axis of rotation radially spaced from the at least first annular portion to define at least one holding recess therebetween; and a collar associated with the reamer connector and slideable in a direction of the axis of rotation between a first position and a second position, the collar being unaligned with the at least one holding recess circumferentially about the axis of rotation in the first position and, in the second position, being rotatably locked to the reamer connector and having a portion circumferentially aligned with the at least one holding recess about the axis of rotation to rotatably lock a holding tab of an orthopaedic shell within the at least one holding recess.
  • An advantage of the present invention is the holding recess can be shaped to hold a large portion of the holding tab to stably connect the orthopaedic shell to the reamer connector.
  • the collar can be quickly switched between the first position and second position to allow for quick connection and disconnection of the orthopaedic shell from the reamer connector.
  • a reamer driver 20 formed in accordance with the present invention which generally includes a drive shaft 22, a reamer connector 24 connected to the drive shaft 22, and a collar 26 associated with the reamer connector 24.
  • the collar 26 is "associated with" the reamer connector 24 in the sense that the collar 26 is located adjacent to the reamer connector 24 to interact with the reamer connector 24 in various positions of the collar 26, as will be described further herein.
  • the drive shaft 22 can include a chuck 28 which is sized and shaped to interact with a rotary driver (not shown), such as a power drill, to rotate the drive shaft 22 about an axis of rotation AR defined by the drive shaft 22.
  • the reamer driver 20 can also include a sleeve 30 placed and fitted over the drive shaft 22 and a biasing element 32, shown as a spring, which bears on the collar 26 and spring 32, the significance of which will be described further herein.
  • a tapered pull back collar 33 which can include grooves (as shown) or knurling is positioned around the drive shaft 22, adjacent to the collar 26, and can either be integral with or separate from the drive shaft 22.
  • the reamer connector 24 can be integrally formed with the drive shaft 22 at a reamer end 34 of the drive shaft 22 opposite the chuck 28 or, alternatively, can be separable from the drive shaft 22.
  • the collar 26, on the other hand, is slideable in a direction along the axis of rotation AR, signified by the arrow D, such as axially along the drive shaft 22, toward and away from the reamer connector 24.
  • the spring 32 can be integrally formed with the collar 26, but the spring 32 can also be a separate element if desired.
  • the sleeve 30 can have a sleeve opening 36 formed therein which houses part of the drive shaft 22 while the sleeve 30 is placed over the drive shaft 22.
  • the sleeve 30 can be secured to the drive shaft 22 by, for example, a spring-loaded pin assembly 38 fitted inside a pin opening 40 formed in the drive shaft 22 and including a pin 42 biased out of the pin opening 40 by a pin spring 44 and set screw 45, with a user depressing the pin 42 into the pin opening 40 to allow the sleeve 30 to slide off the drive shaft 22.
  • the reamer connector 24 includes one or more first annular portions 46, shown as one first annular portion 46 with a plurality of cutouts 47 formed therein, about the axis of rotation AR defined by the drive shaft 22 and one or more second annular portions 48, shown as three second annular portions 48, about the axis of rotation AR and radially spaced apart from the first annular portion 46 to define one or more holding recesses 50 therebetween, with three such holding recesses 50 being shown.
  • first annular portion 46 can define a first radius R1 relative to the axis of rotation AR and the second annular portions 48 can each define a second radius R2 relative to the axis of rotation AR which is greater than the first radius R1 of the first annular portion 46.
  • the reamer connector 24 can also include a rim 52 defined circumferentially about the axis of rotation AR and defining a third radius R3 which is greater than the first radius R1 of the first annular portions 46 and less than the second radius R2 of the second annular portions 48.
  • each "radius" R1, R2, R3 of the first annular portion 46, second annular portions 48, and rim 52, respectively, is considered to be the maximum radius relative to the axis of rotation AR defined by the drive shaft 22.
  • the rim 52 can have one or more projections 54 radially extending from the rim 52, with the projection(s) 54 having a projection radius similar or equal to the second radius R2 of the second annular portions 48, as shown.
  • a projection 54 can be formed adjacent to each second annular portion 48 to define a supporting recess 56 therebetween.
  • each projection 54 can have a projection arc length PAL which is similar or equal to a second annular arc length SAL of a corresponding second annular portion 48, as shown.
  • the first annular portion 46 can define three distinguishable upstanding segments 58 between the cutouts 47 formed in the first annular portion 46.
  • Each of the second annular portions 48 can be connected to or integrally formed with one of the upstanding segments 58, if desired.
  • the upstanding segments 58 can be connected to one another by lower segments 60 of the first annular portion 46, which can define the holding recesses 50 with the second annular portions 48.
  • the first annular portion 46 may alternatively be a solid ring about the axis of rotation AR with no cutouts formed therein.
  • the collar 26 can include a base ring 62 connected to a cylindrical tube 64 by, for example, being integrally formed with the cylindrical tube 64.
  • the previously described spring 32 can be connected to the cylindrical tube 64, the significance of which will be further described herein.
  • One or more collar segments 66 shown as three collar segments, can extend from the base ring 62 and be distinct from one another by three collar cutouts 68 formed therebetween.
  • the collar cutouts 68 can each be sized and shaped to accept one of the projections 54 of the reamer connector 24 when the collar 26 and reamer connector 24 are rotatably locked together, as will be described further herein.
  • the collar segments 66 may each define an equal collar segment arc length CSL, if desired. Further, each collar segment 66 may have a notch 70 formed in one or both circumferential edges 72 of the collar segment 66; in the shown collar 26, each collar segment 66 only has a notch 70 formed in one of the circumferential edges 72 adjacent a top surface 74 of each collar segment 66.
  • the orthopaedic shell 80 has one or more holding tabs 86 which can be formed into an interior 88 of the orthopaedic shell 80 and include a first tab portion 90 extending parallel to the shell axis SA which is connected to a second tab portion 92 extending radially relative to the shell axis SA.
  • the orthopaedic shell 80 can also have a pair of mirrored slots 94A, 94B formed on opposite sides of the holding tabs 86, as well as an additional slot 96 formed between the holding tabs 86 and a rim 98 of the orthopaedic shell 80.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Claims (15)

  1. Antriebsvorrichtung (20) für eine orthopädische Reibahle, mit:
    einer Antriebswelle (22), die eine Drehachse (AR) definiert;
    einem Reibahlenverbinder (24), der mit der Antriebswelle (22) verbunden ist und umfassend mindestens einen ersten ringförmigen Abschnitt (46) um die Drehachse (AR) herum und mindestens einen zweiten ringförmigen Abschnitt (48) um die Drehachse (AR) herum, welcher radial von dem mindestens einen ersten ringförmigen Abschnitt (46) beabstandet ist, um mindestens eine Halteaussparung (50) dazwischen zu definieren; und
    einem Kragen (26), der dem Reibahlenverbinder (24) zugeordnet ist und in Richtung der Drehachse (AR) zwischen einer ersten Position und einer zweiten Position verschiebbar ist, wobei der Kragen (26) in der ersten Position in Umfangsrichtung nicht mit der mindestens einen Halteaussparung um die Drehachse (AR) herum ausgerichtet ist und in der zweiten Position (AR) drehbar mit dem Reibahlenverbinder (24) verriegelt ist und einen Abschnitt aufweist, der in Umfangsrichtung mit der mindestens einen Halteaussparung (50) um die Drehachse (AR) herum ausgerichtet ist, um eine Haltelasche (86) einer orthopädischen Schale (80) innerhalb der mindestens einen Halteaussparung (50) drehbar zu verriegeln.
  2. Antriebsvorrichtung (20) nach Anspruch 1, wobei der Reibahlenverbinder (24) einen in der Umfangsrichtung um die Drehachse (AR) herum definierten Rand (52) aufweist.
  3. Antriebsvorrichtung (20) nach Anspruch 2, wobei der mindestens eine erste ringförmige Abschnitt (46) einen ersten Radius (R1) relativ zur Drehachse (AR) definiert, der mindestens eine zweite ringförmige Abschnitt (48) einen zweiten Radius (R2) relativ zur Drehachse (AR) definiert und der Rand (52) einen dritten Radius (R3) relativ zur Drehachse (AR) definiert, wobei der dritte Radius (R3) kleiner ist als der zweite Radius (R2) und größer als der erste Radius (R1).
  4. Antriebsvorrichtung (20) nach Anspruch 2 oder 3, wobei der Reibahlenverbinder (24) mindestens einen Vorsprung (54) aufweist, der radial vom Rand (52) hervorsteht, und der Kragen (26) mindestens einen darin ausgebildeten Ausschnitt (68) aufweist, wobei der mindestens eine Vorsprung (54) in den mindestens einen Ausschnitt (68) passt, wenn sich der Kragen (26) in der zweiten Position befindet.
  5. Antriebsvorrichtung (20) nach einem der Ansprüche 1 bis 4, ferner mit einem Vorspannelement (32), das dafür konfiguriert ist, den Kragen (26) in Richtung zur zweiten Position vorzuspannen, und
    vorzugsweise ferner mit einer Hülse (30), die über der Antriebswelle (22) angeordnet ist und gegen das Vorspannelement (32) drückt.
  6. Antriebsvorrichtung (20) nach Anspruch 4, wobei der mindestens eine Vorsprung (54) und der mindestens eine zweite ringförmige Abschnitt (48) eine Stützaussparung (56) dazwischen definieren.
  7. Antriebsvorrichtung (20) nach einem der Ansprüche 1 bis 6, wobei der Kragen (26) entlang der Antriebswelle (22) in Richtung der Drehachse (AR) zwischen der ersten Position und der zweiten Position axial verschiebbar ist.
  8. Orthopädisches Reibahlensystem (100), mit:
    einer Antriebswelle (22), die eine Drehachse (AR) definiert;
    einem Reibahlenverbinder (24), der mit der Antriebswelle (22) verbunden ist und mindestens einen ersten ringförmigen Abschnitt (46) um die Drehachse (AR) herum und mindestens einen zweiten ringförmigen Abschnitt (48) um die Drehachse (AR) herum aufweist, der radial von dem mindestens einen ersten ringförmigen Abschnitt (46) beabstandet ist, um mindestens eine Halteaussparung (50) dazwischen zu definieren;
    einer orthopädischen Schale (80), die eine Außenfläche (82) mit einer Vielzahl von darin ausgebildeten Öffnungen (84) und mindestens eine Haltelasche (86) aufweist, die in der mindestens einen Halteaussparung (50) angeordnet ist; und
    einem Kragen (26), der dem Reibahlenverbinder (24) zugeordnet ist und in Richtung der Drehachse (AR) zwischen einer ersten Position und einer zweiten Position verschiebbar ist, wobei die mindestens eine Haltelasche (86) aus der mindestens einen Halteaussparung (50) herausdrehbar ist, wenn sich der Kragen (26) in der ersten Position befindet, der Kragen (26) drehbar mit dem Reibahlenverbinder (24) verriegelt ist, wobei ein Abschnitt des Kragens (26) in Umfangsrichtung mit der Halteaussparung (50) ausgerichtet ist, um die mindestens eine Haltelasche (86) innerhalb der mindestens einen Halteaussparung (50) in der zweiten Position drehbar zu verriegeln.
  9. Orthopädisches Reibahlensystem (100) nach Anspruch 8, wobei der Reibahlenverbinder (24) einen in Umfangsrichtung um die Drehachse (AR) herum definierten Rand (52) aufweist.
  10. Orthopädisches Reibahlensystem (100) nach Anspruch 9, wobei der mindestens eine erste ringförmige Abschnitt (46) einen ersten Radius (R1) relativ zur Drehachse (AR) definiert, der mindestens eine zweite ringförmige Abschnitt (48) einen zweiten Radius (R2) relativ zur Drehachse (AR) definiert und der Rand (52) einen dritten Radius (R3) relativ zur Drehachse (AR) definiert, wobei der dritte Radius (R3) kleiner ist als der zweite Radius (R2) und größer als der erste Radius (R1).
  11. Orthopädisches Reibahlensystem (100) nach Anspruch 9 oder 10, wobei der Reibahlenverbinder (24) mindestens einen Vorsprung (54) aufweist, der radial vom Rand (52) hervorsteht, und der Kragen (26) mindestens einen darin ausgebildeten Ausschnitt (68) aufweist, wobei der mindestens eine Vorsprung (54) in den mindestens einen Ausschnitt (68) passt, wenn sich der Kragen (26) in der zweiten Position befindet.
  12. Orthopädisches Reibahlensystem (100) nach einem der Ansprüche 8 bis 11, ferner mit einem Vorspannelement (32), das dafür konfiguriert ist, den Kragen (26) in Richtung zur zweiten Position vorzuspannen; und
    vorzugsweise ferner mit einer Hülse (30), die über der Antriebswelle (22) angeordnet ist und gegen das Vorspannelement (32) drückt.
  13. Orthopädisches Reibahlensystem (100) nach Anspruch 11, wobei der mindestens eine Vorsprung (54) und der mindestens eine zweite ringförmige Abschnitt (48) eine Stützaussparung (56) dazwischen definieren.
  14. Orthopädisches Reibahlensystem (100) nach Anspruch 13, wobei die orthopädische Schale (80) eine Schalenachse (SA) definiert und die mindestens eine Haltelasche (86) einen sich parallel zur Schalenachse (SA) erstreckenden ersten Laschenabschnitt (90) und einen sich radial zur Schalenachse (SA) erstreckenden zweiten Laschenabschnitt (92) definiert, wobei der erste Laschenabschnitt (90) in der mindestens einen Halteaussparung (50) gehalten wird und der zweite Laschenabschnitt (92) in der Stützaussparung (56) gehalten wird.
  15. Orthopädisches Reibahlensystem (100) nach einem der Ansprüche 8 bis 14, wobei der Kragen (26) entlang der Antriebswelle (22) in Richtung der Drehachse (AR) zwischen der ersten Position und der zweiten Position axial verschiebbar ist.
EP18199172.0A 2017-10-10 2018-10-08 Orthopädisches reibahlensystem Active EP3485821B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/728,652 US10595881B2 (en) 2017-10-10 2017-10-10 Orthopaedic reamer system

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EP3485821A1 EP3485821A1 (de) 2019-05-22
EP3485821B1 true EP3485821B1 (de) 2023-12-13

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10092304B2 (en) * 2014-09-30 2018-10-09 Depuy Ireland Unlimited Company Orthopaedic surgical instrument assembly for reaming a patient's acetabulum
EP4069104A1 (de) * 2019-12-02 2022-10-12 DePuy Ireland Unlimited Company Anordnungen und bausätze zum aufbohren, verfahren zum zusammenbau von fräsern und ihre verwendung zum aufbohren einea orthopädischen gelenks

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7217271B2 (en) * 2002-09-13 2007-05-15 Symmetry Medical, Inc. Orthopaedic reamer driver for minimally invasive surgery
US6875217B2 (en) 2003-01-08 2005-04-05 Symmetry Medical, Inc. Orthopaedic reamer assembly
GB0305777D0 (en) * 2003-03-13 2003-04-16 Depuy Int Ltd An assembly for use in orthopaedic surgery
GB0812406D0 (en) * 2008-07-07 2008-08-13 Smith & Nephew Medical device
GB201105932D0 (en) * 2011-04-08 2011-05-18 Finsbury Dev Ltd A surgical drive tool
US10092304B2 (en) 2014-09-30 2018-10-09 Depuy Ireland Unlimited Company Orthopaedic surgical instrument assembly for reaming a patient's acetabulum
FR3028169B1 (fr) 2014-11-07 2020-02-14 Deuxventorio Sarl Porte-outil pour outil chirurgical

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US10595881B2 (en) 2020-03-24
EP3485821A1 (de) 2019-05-22
US20190105061A1 (en) 2019-04-11

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